传递拉力的PBL剪力键群逐步扩大子结构法  

Gradually Expanding Substructure Method for PBL Shear Connector Group Transmitting Tensile Load

作　　者：张育智[1] 李乔[1] 卜一之[1] 赵雷[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《中国公路学报》2013年第4期125-131,共7页China Journal of Highway and Transport

基　　金：中央高校基本科研业务费专项资金项目(2009QK06)

摘　　要：为提高对PBL剪力键群的计算分析能力,针对传递轴向拉力PBL剪力键群边界条件简单,复杂的整体结构由构造相同的简单结构组成的特点,以单孔PBL剪力键荷载-滑移曲线为基础,以钢构件、混凝土构件的平衡条件及位移协调条件为依据,结合子结构法求解复杂结构的思路,提出了求解PBL剪力键群传力机理的逐步扩大子结构法;通过与2孔、5孔和6孔PBL剪力键群传力机理有限元分析结果对比,验证了该方法的正确性。研究结果表明:剪力键群中各剪力键承担的荷载不仅与总荷载有关,而且与剪力键的位置及其刚度有关,设计时应综合考虑。In order to improve the analysis ability for the perfobond rib shear connector（PBL shear connector） group,a gradually expanding substructure method was put forward for the PBL shear connector group transmitting axial tensile load with the simple boundary conditions and the repeated simple structure components.The gradually expanding substructure method was derived based on the load-slip curve of the single PBL shear connector and the force and displacement equations of the steel and concrete components.The method was validated by the comparison of the results of two-hole,five-hole and six-hole PBL connector groups by finite element method.The results show that the load carried by each shear connector in the shear connector group,which should be comprehensively considered in design,is affected not only by the load applied but also by the position and stiffness of the shear connector,comprehensive consideration is necessary in design.

关 键 词：桥梁工程 PBL剪力键群 逐步扩大子结构法 传力机理 有限元法 组合结构 

分 类 号：U448.38[建筑科学—桥梁与隧道工程]